Mapping Application Version to custom domain

[Ugorji Nwoke]

I am trying to build a site consisting of different applications (sort of like google has mail, calendar, appengine, etc being different apps). I want to organize them as different applications so I can develop and deploy them independently one after the other. 

Currently, different applications cannot access the same datastore, but different versions of an app can (and we are allowed up to 10 versions of each app). This seems like a workable solution for me as I want the flexibility to have the different apps work off the same datastore.

My only concern is how to map a version to a custom domain. For example, I can map my application to www.mydomain.com, but I also want to map version cool to cool.mydomain.com (instead of only having cool.latest.myapp.appspot.com). 

Can folks (especially google folks) give me some pointers on how to achieve this, if possible?

Thanks.

[Ugorji Nwoke]

This will also allow me support a mobile version of the app from m.<domain> e.g. www.mydomain.com and m.mydomain.com are different versions of the same application working off the same datastore.

For both scenarios, I just need the ability to have application versions be mapped to custom domains. 

I tried doing 1.latest.<mycustomdomain> but that did not work.

[Ugorji Nwoke]

I see there's a feature request for this:

http://code.google.com/p/googleappengine/issues/detail?id=2878

Can this possibly make it to the roadmap? I think it will solve a lot of headaches for a lot of people.